When Do You Know You're Pushing Too Hard Instead of Progressing?

Lately, I’ve noticed that my strength gains have stalled, and I’m feeling more fatigued than usual during workouts. It’s got me wondering how do you all recognize when you’re crossing the line from effective progressive overloading into overreaching? I’m curious about the little signs your body gives you before it becomes a bigger issue. What tips do you have for staying in that sweet spot where you’re challenging yourself without burning out?